Stator bar water box cover joint brazing tool

Abstract

The utility model discloses a stator bar water box cover joint brazing tool relates to the field of steam turbine generator. The stator bar water box cover of steam turbine generator needs to use the brazing flux to weld in the welding process, and a small amount of brazing flux residue will be after the brazing flux melts in the welding process, and the overall joint performance is affected, so some methods are needed to be adopted to discharge the brazing flux to improve the joint performance in the welding process. The utility model discloses support frame, screw rod, compaction disc, first slide rail, second slide rail, first connecting rod, second connecting rod, pressure plate, ball bearing, ring. The utility model provides the pressure to water box cover, and the water box cover after compaction can rotate in small range, and the residual brazing flux in joint is discharged, thereby improving the joint performance, and the structural characteristics of stator bar water box are fully considered, and the close adhesion of water box and water box cover under various conditions can be guaranteed without using additional clamping tool in the welding process, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine generator technology, and in particular to a brazing tool for stator bar water box cover joint. Background Technology

[0002] When leaks occur at the stator bar water box cover joint of a steam turbine generator, requiring on-site repair, brazing filler metal and flux are sometimes used. After welding, flux residue remains near the weld, affecting the overall joint performance. During on-site assembly, the stator bars are vertical, allowing residue to be removed by rotating the water box cover after welding. However, during on-site repair, the stator bars are horizontal, making it impossible to rotate the water box cover during welding. This results in a small amount of residue remaining at the weld after repair, affecting joint performance. To ensure brazing quality of weld joints under various complex conditions, designing dedicated brazing tools is crucial. Utility Model Content

[0003] The purpose of this invention is to overcome the problem that flux residue remains near the weld after welding, affecting the overall joint performance, and to provide a brazing tool for stator bar water box cover joints.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a brazing tool for a stator bar water box cover joint, comprising a support frame, a screw, a clamping disc, a first slide rail, a second slide rail, a first connecting rod, a second connecting rod, a pressure plate, balls, and rings. The support frame is connected to the clamping disc via the screw. The lower end face of the clamping disc is milled with a groove and is bolted to the upper end faces of the first and second slide rails respectively. The upper ends of the first and second connecting rods are welded with rings, and the upper end faces have ball grooves adapted to the balls. After the balls are placed into the ball grooves, the first and second connecting rods are inserted into the first and second slide rails respectively. The lower ends of the first and second connecting rods are threaded to the upper end face of the pressure plate.

[0005] Furthermore, grooves are milled out on the outer sides of the second slide rail and the second connecting rod, and locating pins are installed on the grooves.

[0006] Furthermore, both the first and second slide rails are arc-shaped tracks, sharing the same center point after being fixed to the clamping disc.

[0007] Furthermore, the ends of the first and second connecting rods need to be quenched.

[0008] Furthermore, the ring is made of austenitic stainless steel.

[0009] Furthermore, the balls are made of martensitic stainless steel.

[0010] The beneficial effects of this utility model are as follows: the brazing tool described in this utility model can ensure that while applying pressure to the water tank cover, the water tank cover after being pressed can rotate within a small range, thereby causing the flux remaining in the joint to be discharged, thus improving the joint performance.

[0011] Specifically:

[0012] 1. This utility model fully considers the structural characteristics of the stator bar water box during the design process. No additional clamping tools are required during the welding process to ensure a tight fit between the water box and the water box cover under various conditions. The operation is simple and convenient.

[0013] 2. This utility model is made of common industrial materials, with simple structure, light weight, low manufacturing cost, and high input-output ratio, making it suitable for widespread use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connecting rod section.

[0016] In the diagram, 1-support frame; 2-screw; 3-clamping disc; 4-first slide rail; 5-second slide rail; 6-positioning pin; 7-first connecting rod; 8-second connecting rod; 9-pressure plate; 10-ball bearing; 11-ring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0018] Example:

[0019] like Figures 1-2 As shown, this utility model provides a brazing tool for a stator bar water box cover joint, including a support frame 1, a screw 2, a clamping disc 3, a first slide rail 4, a second slide rail 5, a first connecting rod, a second connecting rod 8, a pressure plate 9, balls 10, and a ring 11. The support frame 1 is connected to the clamping disc 3 via the screw 2. The lower end face of the clamping disc 3 is milled with a groove and is fixed to the upper end face of the first slide rail 4 and the second slide rail 5 with bolts. The upper end of the first connecting rod 7 and the second connecting rod 8 is welded with a ring 11, and the upper end face has a ball groove adapted to the ball 10. After the ball 10 is placed into the ball groove, the first connecting rod 7 and the second connecting rod 8 are inserted into the first slide rail 4 and the second slide rail 5 respectively. The lower end of the first connecting rod 7 and the second connecting rod 8 is threaded to the upper end face of the pressure plate 9.

[0020] Among them, the second slide rail 5 and the second connecting rod 8 have grooves milled on their outer sides, and positioning pins 6 are provided on the grooves.

[0021] Among them, the first slide rail 4 and the second slide rail 5 are both arc-shaped tracks, and have the same center after being fixed with the pressing disc 3.

[0022] The ends of the first connecting rod 7 and the second connecting rod 8 need to be quenched.

[0023] Among them, the support frame 1, screw 2, clamping disc 3, first slide rail 4, second slide rail 5, positioning pin 6, pressure plate 9, and ring 11 are made of austenitic stainless steel.

[0024] Among them, the ball bearing 10 is made of martensitic stainless steel.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A brazing tool for a stator bar water box cover joint, characterized in that: The assembly includes a support frame (1), a screw (2), a clamping disc (3), a first slide rail (4), a second slide rail (5), a first connecting rod (7), a second connecting rod (8), a pressure plate (9), a ball bearing (10), and a ring (11). The support frame (1) is connected to the clamping disc (3) via the screw (2). The lower end face of the clamping disc (3) is milled with a groove and is fixed to the upper end face of the first slide rail (4) and the second slide rail (5) with bolts. The upper end of the first connecting rod (7) and the second connecting rod (8) is welded with a ring (11). The upper end face has a ball bearing groove that matches the ball bearing (10). After the ball bearing (10) is placed into the ball bearing groove, the first connecting rod (7) and the second connecting rod (8) are inserted into the first slide rail (4) and the second slide rail (5) respectively. The lower end of the first connecting rod (7) and the second connecting rod (8) is threaded to the upper end face of the pressure plate (9).

2. The brazing tool for a stator bar water box cover joint according to claim 1, characterized in that: The second slide rail (5) and the second connecting rod (8) have grooves milled on their outer sides, and positioning pins (6) are provided on the grooves.

3. The brazing tool for a stator bar water box cover joint according to claim 1, characterized in that: The first slide rail (4) and the second slide rail (5) are both arc-shaped tracks, and they have the same center after being fixed with the pressing disc (3).

4. The brazing tool for the stator bar water box cover joint according to claim 1, characterized in that: The ends of the first link (7) and the second link (8) need to be quenched.

5. The brazing tool for the stator bar water box cover joint according to claim 1, characterized in that: The ring (11) is an austenitic stainless steel ring (11).

6. The brazing tool for a stator bar water box cover joint according to claim 1, characterized in that: The ball (10) is a martensitic stainless steel ball (10).

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